#!/usr/bin/node

const usr{
  name: '王顶',
  age: 41,
  qq:'408542507' 
};

const log = console.log;

log('name: %s', user.name);
log('age: %d',user.age);
log('JSON: %j',user);

log('qq: %s', user.qq);
log('qq:',user.qq);
log('qq:' + user.qq);
log(`qq:${user.qq}`);

console.error('Error! something wrong!');
